L4990D中文資料意法半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)
| 廠商型號(hào) |
L4990D |
| 功能描述 | PRIMARY CONTROLLER |
| 文件大小 |
322.27 Kbytes |
| 頁(yè)面數(shù)量 |
24 頁(yè) |
| 生產(chǎn)廠商 | STMicroelectronics |
| 企業(yè)簡(jiǎn)稱(chēng) |
STMICROELECTRONICS【意法半導(dǎo)體】 |
| 中文名稱(chēng) | 意法半導(dǎo)體集團(tuán)官網(wǎng) |
| 原廠標(biāo)識(shí) |  |
| 數(shù)據(jù)手冊(cè) | |
| 更新時(shí)間 | 2025-7-27 10:19:00 |
| 人工找貨 | L4990D價(jià)格和庫(kù)存，歡迎聯(lián)系客服免費(fèi)人工找貨 |
L4990D規(guī)格書(shū)詳情
DESCRIPTION
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM control ler this device includes some features as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start in tervention.
■ CURRENT-MODE CONTROL PWM
■ SWITCHING FREQUENCY UP TO 1MHz
■ LOW START-UP CURRENT < 0.45mA
■ HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)
■ FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
■ PROGRAMMABLE DUTY CYCLE
■ 100 AND 50 MAXIMUM DUTY CYCLE LIMIT
■ PROGRAMMABLE SOFT START
■ PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
■ PWM UVLO WITH HYSTERESIS
■ IN/OUT SYNCHRONIZATION
■ DISABLE LATCHED
■ INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
■ PACKAGE: DIP16 AND SO16W
產(chǎn)品屬性
- 型號(hào)：
L4990D
- 制造商：
STMICROELECTRONICS
- 制造商全稱(chēng)：
STMicroelectronics
- 功能描述：
PRIMARY CONTROLLER
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
ST/意法 |
24+ |
SOP |
27950 |
鄭重承諾只做原裝進(jìn)口現(xiàn)貨 |
詢(xún)價(jià) | ||
ST |
20+ |
SOP16 |
2960 |
誠(chéng)信交易大量庫(kù)存現(xiàn)貨 |
詢(xún)價(jià) | ||
ST/意法 |
2402+ |
SOP16 |
8324 |
原裝正品!實(shí)單價(jià)優(yōu)! |
詢(xún)價(jià) | ||
ST/意法 |
24+ |
SOP-16 |
9600 |
原裝現(xiàn)貨,優(yōu)勢(shì)供應(yīng),支持實(shí)單! |
詢(xún)價(jià) | ||
ST |
22+ |
SO-16 |
5000 |
原裝現(xiàn)貨庫(kù)存.價(jià)格優(yōu)勢(shì)!! |
詢(xún)價(jià) | ||
ST |
24+ |
SOP16 |
21990 |
詢(xún)價(jià) | |||
ST/意法 |
23+ |
SOP-16 |
50000 |
全新原裝正品現(xiàn)貨,支持訂貨 |
詢(xún)價(jià) | ||
ST/意法 |
25+ |
SOP-167.2mm |
65428 |
百分百原裝現(xiàn)貨 實(shí)單必成 |
詢(xún)價(jià) | ||
ST/意法 |
DIP16 |
125000 |
一級(jí)代理原裝正品,價(jià)格優(yōu)勢(shì),長(zhǎng)期供應(yīng)! |
詢(xún)價(jià) | |||
ST/意法 |
23+ |
SOP16 |
5010 |
一級(jí)代理原廠VIP渠道,專(zhuān)注軍工、汽車(chē)、醫(yī)療、工業(yè)、 |
詢(xún)價(jià) |
